html {
    height: 100%;
}
body {
    height: 100%;
}

@keyframes moveClouds {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(100%);
    }
}
@keyframes move {
    0% {top: -60px; }
    100% {top: -20px;}
}
@keyframes fly {
    0% {}
    50% {
        background-position: -50px 0;
    }
    100% {
        background-position: 0 0;
    }
}
@keyframes moveLeft {
    0% {
        right: 0;
    }
    100% {
        right: 100%;
    }
}

.notfound-bg {
    position: absolute;
    z-index: 1;
    top: 30%;
    left: 0;
    width: 100%;
    height: 400px;
    background: transparent url(../images/404.png) no-repeat center center;
}
.notfound-sun {
    position: absolute;
    z-index: 2;
    top: 100px;
    left: 100px;
    display: block;
    width: 100px;
    height: 100px;
    background-color: #f0d7d5;
    border-radius: 50px;
}
.notfound-clouds {
    position: absolute;
    z-index: 3;
    top: 130px;
    left: 0;
    width: 360px;
    height: 80px;
    background: transparent url(../images/clouds_png8.png) no-repeat center 0;
    animation: moveClouds 60s linear infinite alternate;
}
.notfound-plane {
    position: absolute;
    z-index: 4;
    left: 40%;
    top: -60px;
    width: 118px;
    height: 60px;
    line-height: 50px;
    font-family: Georgia;
    font-size: 20px;
    text-align: center;
    background: url(../images/plane.png) no-repeat 0 0;
    animation: move 2s linear infinite alternate;
}
.notfound-bird {
    position: absolute;
    z-index: 5;
    top: 200px;
    right: 0;
    display: block;
    width: 50px;
    height: 40px;
    overflow: hidden;
    background-image: url(../images/bird.png);
    background-repeat: no-repeat;

    animation-name: fly, moveLeft;
    animation-duration: .5s, 30s;
    animation-timing-function: steps(1, start), linear;
    animation-iteration-count: infinite, infinite;
}

